Laser peeling transfer is a technology used for LoqEsoan in 1976. This is the dry process of the prepress engineering introduced at DRUPA 95. It drives the laser that is regarded as an important technology by Polaroid Group, and uses digital The document, based on the Platesetter, transfers the receptive polymer to the plate from a special coloring plate. The ink dots are 5 micron fine dots and have a durability of 200,000 seals. This method is costly and the issue of discarding the released version will become a problem in the future. The technology of thermal cross-linking has been applied to the thermal plate of Kodak. Irradiated with infrared laser at 830nm, the oxygen in the film will be released. This oxygen becomes a catalyst, crosslinking the resin in the membrane. Without cross-linking, it will be treated by the aqueous treatment liquid. After post-baking, it can reach a printing resistance of more than 2 million impressions. Because cross-linking can also be done with the help of UV irradiation, the plate-making machine can also be used. Because the plate receives heat and light to react, it needs to be carried out under safe yellow light during operation. Unprocessed inkjet technology This new versionless technology has not yet occupied a relatively advantageous position. The CtP printing plate can be easily obtained on an inexpensive on-plate imaging machine without developing and post-processing, and can be used immediately after imaging, which is an ideal technology. The inkjet technology already has the conditions, it has the following three characteristics: (1) no processing; (2) no laser and Other optical devices are required; (3) the imaging part of the inkjet device is vertical, and the device is cheap. However, it is not considered that the inkjet device is free of speed and resolution problems. Plate. Imaging machine on the plate. Laser assembly Front-ends for CtP digital printing systems, or pre-press engineering systems, include digital files (usually based on PostScript), replace the files with dot-combined RIPs, laser devices that use dot-combined imaging on an image carrier, etc. . In the CtP system, the on-plate imaging machine (Platesetter) composed of RIPs and lasers must be completely interchangeable with the used plate. Each plate has inherent spectral sensitivity, so it is necessary to use suitable laser. At present, there are 18 types of metal plates, for which more than 20 types of on-plate imaging machines have been produced. The image forming machine on the plate is divided into outer drum scanning type, inner drum scanning type and plane scanning type. All use gas lasers or solid lasers with wavelengths of 488nm, 532nm, 670nm, 830nm, 870nm, 1064nm, etc., using a variety of products. In addition to single beams, there are 8, 16, 32, 48, etc. beams, and split beam lasers are also used. The longer the wavelength (above 800nm), the greater the spread of the laser beam, making it difficult to focus. In addition, the split beam laser can only be used for external drum scanning. As for CtP, there must be a close working relationship between printing and manufacturers of imaging machines on the plate. Based on this, only the required results and necessary training and services can be obtained. A considerable investment (US $ 95,000-700000) is required for the on-board imaging machine, so the selection of CtP needs to be carefully considered, because the new on-board imaging machine or laser device has to be purchased once the plate material changes . The recent outlook of CtP digital color printing (1997-2001) Judging from the general trend, printing has already faced the direction of short-run work. However, 35% of the total prints are still printed at more than 10,000 copies. Therefore, the general printing of the used version still plays a leading role. Digital printing without plates is not cost-effective for printing more than 1,000 sheets. Because of this situation, CtP has attracted the attention of most printing companies. Not only has the quality improved, so has productivity. In the January 1997 issue of American Printer Magazine, Kennard Cloud preached: "The assessment made by experts shows that the worldwide demand for metal plates is 186,600 square meters annually, and CtP will account for 20 ~ 30% of it by the end of 2000. . " According to GATF's technical forecast in 1997, the number of CtP started in the world was 566 units at the end of 1996, and became 2024 units by the end of 2000, half of which were owned by North America (United States and Canada). Most models use silver halide and dye-sensitized photosensitive resins, but thermally sensitive CtP also reached the level of general use in 2001. That is in bright room processing, there is almost no dot increase, rely on binary imaging (only imaging when the energy exceeds the threshold), and post-processing may be less or completely unnecessary features. Creo is a leading manufacturer of imaging machines on thermal plates, and has introduced more than 75 devices to the market using Kodak and Presstek plates. Presstek has used more than 50 devices in the world. Besides, Gerber Linotype-Hell (now Heidelberg), Optonics, etc. are also related to thermal systems. Presstek originally planned to use the new Catalina Coating technology in February 1996 to produce inexpensive and excellent CtP. Most of the plates used are of multi-layer structure, so it is difficult to coat, and good results cannot be obtained by using ordinary coating equipment. The new Catalina Coating technology is a vacuum evaporation device that can form films with thickness errors within 5% on various substrates. According to this technology, it is expected that the CtP version can be produced at low cost. Computer to Plate On -press (CtPs) System The thermal imaging technology proposed by Presstek that leaves little or no dry residue, and does not require liquid treatment, constitutes the concept of imaging on a printing press that was not previously available. Presstek initially tried this in 1991. That is to say, the image destroyed by discharge on the GTO-D14 color machine of Heidelberg cannot obtain satisfactory picture quality and is not accepted by the public. After 1993, the discharge destruction recording method was changed to high-quality Pearl thermal laser stripping technology. Pearl technology is to irradiate the sharp laser to the silicon and aluminum layers from the laser diode (IR) to form very small pixels below 5 microns. At the DRUPA 95 exhibition, MAN Roland introduced the new DICO Web for lithography and gravure. This is a CTC to a seamless cylinder, which can correspond to both offset and gravure printing. It uses a special laser head to transfer the image directly to a hydrophilic seamless plate cylinder. After the transfer, the fixing process is carried out, and the image part receives ink, while the non-image part is generally hydrophilic. After the printing is completed, the surface of the plate cylinder is automatically washed by a washing device to restore the hydrophilic surface. Then make it image again. Printable as usual. In addition, it also introduces the two-step method of making a plate by means of thermal transfer and then transferring it to a hydrophilic plate cylinder. DICO Web gravure is the use of rollers that form concave holes similar to anilox rollers on metal surfaces. It is coated on the roller with a fluid polymer to fill the concave holes. Rely on heat to form an image, focus on a 30-micron laser, use digital imaging files to make it work, and penetrate the polymer layer at various depths to form concave holes. Water-based ink is used for printing, and the blanket cylinder is set indirectly or between the plate cylinder and the press cylinder, and the offset printing method is adopted. The printed image is removed from the surface of the plate cylinder using a pressure sprayer. Dry the cylinder, coat the polymer again, and then proceed to the next printing. In November 1995, Creo proposed a new technical solution for CTC's On-Press system, that is, like a cleaning blanket, a heat-sensitive version of the polymer that can be easily removed with a solvent, washed and coated on the machine It takes only three minutes to image the seamless plate cylinder. After printing, the sleeve is washed, re-coated, and imaged. The sleeve can be used repeatedly many times until it is replaced with a new one. MAN Roland's DICO Web system and Creo's on-board version processing will take years of technology to become practical, but this is to support research and development to strengthen competitiveness in the new short-form live color printing market. CtPs digital color printing in the near future The potential of On-Press imaging is to increase the value of CtP and CtPs technology. It also gives an effective price-performance ratio for printing below 400 sheets. According to the user evaluation of Heidelberg Speedmaster DI, the machine has reached the usual start-up state within a few weeks after setting up. It is very easy to start and prepare. By using the Presstek technology of the new Catalina coating device, by the end of 1997, the life of PearlDry and PearlWet could reach approximately 200,000 impressions. The presses enhanced by Speedmaster DI, from report magazines to high-fidelity levels, can respond to market demands from 400 sheets to 200,000 prints. The author thinks that offset printing is one of the very difficult processes. It is very sensitive to dust. Once the dust is exposed, it will cause circular white spots in the printing. The printer found that there were gray ideas on the plate and would not use it. This is especially true when the image part is found. In the environment of the printing workshop, starch powder and floating particles are often found. The on-board coating of the plate is desirable as an idea, but it may take a lot of time to realize. Computer to Print (CTPt) Systems CTPt belongs to plateless printing, that is, the method of forming an image at the time of printing each sheet. This situation can be extended to a unique process that can print variable information for each piece of different content. The main technologies used are electrophotography, inkjet, ion or electronic electrocure, magnetic particle imaging, thermal printing, sublimation transfer, electrocoagulation imaging, etc.
Airport Security fence is a kind of security fence around the airport.
Airport Fence,Welded Airport Fence,Galvanized Airport Fence,High Security Airport Fence Hebei Giant Metal Technology Co., Ltd. , https://www.hebeigiantmetal.com
In order to ensure the speed and quality of general printing. Driven the progress of CtPt digital printing system. But it has not yet reached the current speed and quality of general offset printing. Most of them can do single-color printing or 4-color printing with partial monochrome printing.
Airport fence is generally Y-shaped post, fixed with razor Barbed Wire on top, which greatly increases the security performance. The mesh under the razor has simple structure and easy to transport. It is installed without any requirement for terrain, highly adaptive for bending zone.
It is mainly used for protection and safety around the airport.
